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Diffstat (limited to 'winsup/cygwin/shared.cc')
-rw-r--r-- | winsup/cygwin/shared.cc | 320 |
1 files changed, 0 insertions, 320 deletions
diff --git a/winsup/cygwin/shared.cc b/winsup/cygwin/shared.cc deleted file mode 100644 index 1d8cf411b..000000000 --- a/winsup/cygwin/shared.cc +++ /dev/null @@ -1,320 +0,0 @@ -/* shared.cc: shared data area support. - - Copyright 1996, 1997, 1998, 1999, 2000, 2001 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <grp.h> -#include <pwd.h> -#include "sync.h" -#include "sigproc.h" -#include "pinfo.h" -#include "fhandler.h" -#include "dtable.h" -#include "cygheap.h" -#include "heap.h" -#include "shared_info.h" -#include "registry.h" -#include "cygwin_version.h" -#include "security.h" - -#define SHAREDVER (unsigned)(cygwin_version.api_major << 16 | \ - cygwin_version.api_minor) - -shared_info NO_COPY *cygwin_shared = NULL; -mount_info NO_COPY *mount_table = NULL; -HANDLE cygwin_mount_h = NULL; - -/* General purpose security attribute objects for global use. */ -SECURITY_ATTRIBUTES NO_COPY sec_none; -SECURITY_ATTRIBUTES NO_COPY sec_none_nih; -SECURITY_ATTRIBUTES NO_COPY sec_all; -SECURITY_ATTRIBUTES NO_COPY sec_all_nih; - -char * __stdcall -shared_name (const char *str, int num) -{ - static NO_COPY char buf[MAX_PATH] = {0}; - char envbuf[6]; - - __small_sprintf (buf, "%s.%s.%d", cygwin_version.shared_id, str, num); - if (GetEnvironmentVariable ("CYGWIN_TESTING", envbuf, 5)) - strcat (buf, cygwin_version.dll_build_date); - return buf; -} - -void * __stdcall -open_shared (const char *name, HANDLE &shared_h, DWORD size, void *addr) -{ - void *shared; - - if (!shared_h) - { - char *mapname; - if (!name) - mapname = NULL; - else - { - mapname = shared_name (name, 0); - shared_h = OpenFileMappingA (FILE_MAP_READ | FILE_MAP_WRITE, - TRUE, mapname); - } - if (!shared_h && - !(shared_h = CreateFileMappingA (INVALID_HANDLE_VALUE, - &sec_all, - PAGE_READWRITE, - 0, - size, - mapname))) - api_fatal ("CreateFileMappingA, %E. Terminating."); - } - - shared = (shared_info *) MapViewOfFileEx (shared_h, - FILE_MAP_READ | FILE_MAP_WRITE, - 0, 0, 0, addr); - - if (!shared) - { - /* Probably win95, so try without specifying the address. */ - shared = (shared_info *) MapViewOfFileEx (shared_h, - FILE_MAP_READ|FILE_MAP_WRITE, - 0,0,0,0); - } - - if (!shared) - api_fatal ("MapViewOfFileEx '%s'(%p), %E. Terminating.", name, shared_h); - - debug_printf ("name %s, shared %p (wanted %p), h %p", name, shared, addr, shared_h); - - /* FIXME: I couldn't find anywhere in the documentation a note about - whether the memory is initialized to zero. The code assumes it does - and since this part seems to be working, we'll leave it as is. */ - return shared; -} - -void -shared_info::initialize () -{ - /* Ya, Win32 provides a way for a dll to watch when it's first loaded. - We may eventually want to use it but for now we have this. */ - if (inited) - { - if (inited != SHAREDVER) - api_fatal ("Shared region version mismatch. Version %x != %x.\n" - "Are you using multiple versions of cygwin1.dll?\n" - "Run 'cygcheck -r -s -v' to find out.", - inited, SHAREDVER); - return; - } - - /* Initialize the queue of deleted files. */ - delqueue.init (); - - /* Initialize tty table. */ - tty.init (); - - /* Fetch misc. registry entries. */ - - reg_key reg (KEY_READ, NULL); - - /* Note that reserving a huge amount of heap space does not result in - the use of swap since we are not committing it. */ - /* FIXME: We should not be restricted to a fixed size heap no matter - what the fixed size is. */ - - heap_chunk_in_mb = reg.get_int ("heap_chunk_in_mb", 256); - if (heap_chunk_in_mb < 4) - { - heap_chunk_in_mb = 4; - reg.set_int ("heap_chunk_in_mb", heap_chunk_in_mb); - } - - inited = SHAREDVER; -} - -void __stdcall -memory_init () -{ - /* Initialize general shared memory */ - HANDLE shared_h = cygheap ? cygheap->shared_h : NULL; - cygwin_shared = (shared_info *) open_shared ("shared", - shared_h, - sizeof (*cygwin_shared), - cygwin_shared_address); - - cygwin_shared->initialize (); - heap_init (); - - /* Allocate memory for the per-user mount table */ - char user_name[MAX_USER_NAME]; - DWORD user_name_len = MAX_USER_NAME; - - if (!GetUserName (user_name, &user_name_len)) - strcpy (user_name, "unknown"); - mount_table = (mount_info *) open_shared (user_name, cygwin_mount_h, - sizeof (mount_info), 0); - debug_printf ("opening mount table for '%s' at %p", cygheap->user.name (), - mount_table_address); - ProtectHandle (cygwin_mount_h); - debug_printf ("mount table version %x at %p", mount_table->version, mount_table); - - /* Initialize the Cygwin heap, if necessary */ - if (!cygheap) - { - cygheap_init (); - cygheap->user.set_name (user_name); - } - cygheap->shared_h = shared_h; - ProtectHandle (cygheap->shared_h); - - /* Initialize the Cygwin per-user mount table, if necessary */ - if (!mount_table->version) - { - mount_table->version = MOUNT_VERSION; - debug_printf ("initializing mount table"); - mount_table->init (); /* Initialize the mount table. */ - } -} - -void __stdcall -shared_terminate () -{ - if (cygheap->shared_h) - ForceCloseHandle (cygheap->shared_h); - if (cygwin_mount_h) - ForceCloseHandle (cygwin_mount_h); -} - -unsigned -shared_info::heap_chunk_size () -{ - return heap_chunk_in_mb << 20; -} - -/* For apps that wish to access the shared data. */ - -shared_info * -cygwin_getshared () -{ - return cygwin_shared; -} - -/* - * Function to return a common SECURITY_DESCRIPTOR * that - * allows all access. - */ - -static NO_COPY SECURITY_DESCRIPTOR *null_sdp = 0; - -SECURITY_DESCRIPTOR *__stdcall -get_null_sd () -{ - static NO_COPY SECURITY_DESCRIPTOR sd; - - if (null_sdp == 0) - { - InitializeSecurityDescriptor (&sd, SECURITY_DESCRIPTOR_REVISION); - SetSecurityDescriptorDacl (&sd, TRUE, 0, FALSE); - null_sdp = &sd; - } - return null_sdp; -} - -extern PSID get_admin_sid (); -extern PSID get_system_sid (); -extern PSID get_creator_owner_sid (); - -PSECURITY_ATTRIBUTES __stdcall -sec_user (PVOID sa_buf, PSID sid2, BOOL inherit) -{ - if (! sa_buf) - return inherit ? &sec_none_nih : &sec_none; - - PSECURITY_ATTRIBUTES psa = (PSECURITY_ATTRIBUTES) sa_buf; - PSECURITY_DESCRIPTOR psd = (PSECURITY_DESCRIPTOR) - ((char *) sa_buf + sizeof (*psa)); - PACL acl = (PACL) ((char *) sa_buf + sizeof (*psa) + sizeof (*psd)); - - char sid_buf[MAX_SID_LEN]; - PSID sid = (PSID) sid_buf; - - if (cygheap->user.sid ()) - CopySid (MAX_SID_LEN, sid, (void *) cygheap->user.sid ()); - else if (! lookup_name (getlogin (), cygheap->user.logsrv (), sid)) - return inherit ? &sec_none_nih : &sec_none; - - size_t acl_len = sizeof (ACL) - + 4 * (sizeof (ACCESS_ALLOWED_ACE) - sizeof (DWORD)) - + GetLengthSid (sid) - + GetLengthSid (get_admin_sid ()) - + GetLengthSid (get_system_sid ()) - + GetLengthSid (get_creator_owner_sid ()); - if (sid2) - acl_len += sizeof (ACCESS_ALLOWED_ACE) - sizeof (DWORD) - + GetLengthSid (sid2); - - if (! InitializeAcl (acl, acl_len, ACL_REVISION)) - debug_printf ("InitializeAcl %E"); - - if (! AddAccessAllowedAce (acl, ACL_REVISION, - SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL, - sid)) - debug_printf ("AddAccessAllowedAce(%s) %E", getlogin ()); - - if (! AddAccessAllowedAce (acl, ACL_REVISION, - SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL, - get_admin_sid ())) - debug_printf ("AddAccessAllowedAce(admin) %E"); - - if (! AddAccessAllowedAce (acl, ACL_REVISION, - SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL, - get_system_sid ())) - debug_printf ("AddAccessAllowedAce(system) %E"); - - if (! AddAccessAllowedAce (acl, ACL_REVISION, - SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL, - get_creator_owner_sid ())) - debug_printf ("AddAccessAllowedAce(creator_owner) %E"); - - if (sid2) - if (! AddAccessAllowedAce (acl, ACL_REVISION, - SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL, - sid2)) - debug_printf ("AddAccessAllowedAce(sid2) %E"); - - if (! InitializeSecurityDescriptor (psd, - SECURITY_DESCRIPTOR_REVISION)) - debug_printf ("InitializeSecurityDescriptor %E"); - -/* - * Setting the owner lets the created security attribute not work - * on NT4 SP3 Server. Don't know why, but the function still does - * what it should do also if the owner isn't set. -*/ -#if 0 - if (! SetSecurityDescriptorOwner (psd, sid, FALSE)) - debug_printf ("SetSecurityDescriptorOwner %E"); -#endif - - if (! SetSecurityDescriptorDacl (psd, TRUE, acl, FALSE)) - debug_printf ("SetSecurityDescriptorDacl %E"); - - psa->nLength = sizeof (SECURITY_ATTRIBUTES); - psa->lpSecurityDescriptor = psd; - psa->bInheritHandle = inherit; - return psa; -} - -SECURITY_ATTRIBUTES *__stdcall -sec_user_nih (PVOID sa_buf, PSID sid2) -{ - return sec_user (sa_buf, sid2, FALSE); -} |